1. In a bowl, combine wheat gluten and nutritional yeast flakes; set aside.
2. In another blender, combine remaining seitan ingredients; blend well. Blend into gluten mixture; mix well. Let the wheat gluten mixture rise for a few minutes
3. Form gluten mixture into log and rub with cayenne pepper, salt, and pepper. Wrap seitan log in foil.
4. In a medium pot, add vegetable broth and wrapped seitan log. Place pot cover on pot, but allow some room for the steam. Place pot over low heat. Steam seitan for 1 to 1-1/2 hours. Make sure you don't run out of broth as you steam. Add more if you need to as you steam.
5. To store, keep the seitan in the foil you steamed it in.
Source of recipe: I wrote the recipe. For more information, please see my blog here: http://veganmiss.blogspot.com/2011/01/po-boy-sandwich.html